<template>
  <!-- 商品分类导航 -->
  <div class="type-nav">
    <div class="container" @mouseleave="leaveIndex" @mouseenter="enterShow">
      <div>
        <h2 class="all">全部商品分类</h2>
        <!-- 过度动画 -->
        <transition name="sort">
          <!-- 三级联动 -->
          <div class="sort" v-if="show">
            <div class="all-sort-list2" @click="goSearch">
              <div class="item" v-for="(item, index) in categeroyList" :key="item.categoryId" :class="{ cur: currentIndex === index }">
                <h3 @mouseenter="changeIndex(index)">
                  <a :data-categoryName="item.categoryName" :data-category1Id="item.categoryId">{{ item.categoryName }}</a>
                  <!-- <router-link to="/search">{{ item.categoryName }}</router-link> -->
                </h3>
                <div class="item-list clearfix" :style="{ display: currentIndex === index ? 'block' : 'none' }">
                  <div class="subitem" v-for="item2 in item.categoryChild" :key="item2.categoryId">
                    <dl class="fore">
                      <dt>
                        <!-- 二级分类 -->
                        <a :data-categoryName="item2.categoryName" :data-category2Id="item2.categoryId">{{ item2.categoryName }}</a>
                        <!-- <router-link to="/search">{{ item2.categoryName }}</router-link> -->
                      </dt>
                      <dd>
                        <!-- 三级分类 -->
                        <em v-for="item3 in item2.categoryChild" :key="item3.categoryId">
                          <a :data-categoryName="item3.categoryName" :data-category3Id="item3.categoryId">{{ item3.categoryName }}</a>
                          <!-- <router-link to="/search">{{ item3.categoryName }}</router-link> -->
                        </em>
                      </dd>
                    </dl>
                  </div>
                </div>
              </div>
            </div>
          </div>
        </transition>
      </div>

      <nav class="nav">
        <a href="###">服装城</a>
        <a href="###">美妆馆</a>
        <a href="###">尚品汇超市</a>
        <a href="###">全球购</a>
        <a href="###">闪购</a>
        <a href="###">团购</a>
        <a href="###">有趣</a>
        <a href="###">秒杀</a>
      </nav>
    </div>
  </div>
</template>

<script>
//导入Vuex
import { mapState } from 'vuex'

export default {
  naem: 'TyNav',
  data() {
    return {
      currentIndex: null,
      show: true,
    }
  },
  methods: {
    //给鼠标添加样式
    /*   changeIndex(index) {
      this.currentIndex = index
    }, */
    changeIndex(index) {
      let time = null //节流阀
      if (time) {
        return
      }
      time = setTimeout(() => {
        this.currentIndex = index
      }, 50)
    },
    //给鼠标离开时添加样式
    leaveIndex() {
      this.currentIndex = null
      if (this.$route.path != '/home') {
        this.show = false
      }
    },
    goSearch(e) {
      let { categoryname, category1id, category2id, category3id } = e.target.dataset
      let location = { name: 'search' }
      let query = { categoryName: categoryname }
      if (categoryname) {
        //一级分类
        if (category1id) {
          query.category1Id = category1id
        } else if (category2id) {
          //二级分类
          query.category2Id = category2id
        } else if (category3id) {
          //三级分类
          query.category3Id = category3id
        }
        if (this.$route.params) {
          location.query = query
          location.params = this.$route.params
          this.$router.push(location)
        }
      }
    },
    enterShow() {
      this.show = true
    },
  },
  computed: {
    ...mapState({
      categeroyList: (state) => {
        return state.home.categeroyList
      },
    }),
  },
  mounted() {
    if (this.$route.path != '/home') {
      this.show = false
    }
  },
}
</script>

<style lang="less" scoped>
.type-nav {
  border-bottom: 2px solid #e1251b;

  .container {
    width: 1200px;
    margin: 0 auto;
    display: flex;
    position: relative;

    .all {
      width: 210px;
      height: 45px;
      background-color: #e1251b;
      line-height: 45px;
      text-align: center;
      color: #fff;
      font-size: 14px;
      font-weight: bold;
    }

    .nav {
      a {
        height: 45px;
        margin: 0 22px;
        line-height: 45px;
        font-size: 16px;
        color: #333;
      }
    }

    .sort {
      position: absolute;
      left: 0;
      top: 45px;
      width: 210px;
      height: 461px;
      position: absolute;
      background: #fafafa;
      z-index: 999;

      .all-sort-list2 {
        .item {
          h3 {
            line-height: 30px;
            font-size: 14px;
            font-weight: 400;
            overflow: hidden;
            padding: 0 20px;
            margin: 0;

            a {
              color: #333;
            }
          }

          .item-list {
            display: none;
            position: absolute;
            width: 734px;
            min-height: 460px;
            background: #f7f7f7;
            left: 210px;
            border: 1px solid #ddd;
            top: 0;
            z-index: 9999 !important;

            .subitem {
              float: left;
              width: 650px;
              padding: 0 4px 0 8px;

              dl {
                border-top: 1px solid #eee;
                padding: 6px 0;
                overflow: hidden;
                zoom: 1;

                &.fore {
                  border-top: 0;
                }

                dt {
                  float: left;
                  width: 54px;
                  line-height: 22px;
                  text-align: right;
                  padding: 3px 6px 0 0;
                  font-weight: 700;
                }

                dd {
                  float: left;
                  width: 415px;
                  padding: 3px 0 0;
                  overflow: hidden;

                  em {
                    float: left;
                    height: 14px;
                    line-height: 14px;
                    padding: 0 8px;
                    margin-top: 5px;
                    border-left: 1px solid #ccc;
                  }
                }
              }
            }
          }
          /* 
          &:hover {
            .item-list {
              display: block;
            }
          } */
        }
        .cur {
          background-color: skyblue;
        }
      }
    }
    // 过度动画的样式
    .sort-enter {
      height: 0px;
    }
    .sort-enter.to {
      height: 461px;
    }
    .sort-enter-active {
      transition: all 0.5s;
    }
  }
}
</style>